FAB Expansion Joint
- Cost efficient for large ducting applications
- Lower initial cost compared to a metal expansion joint
- Lower repair/replacement cost compared to a metal expansion joint
- Can be installed over existing metal expansion joints
- Negligible spring forces
- Large movement capacity
- Can absorb movements in multiple planes
- No size limit (large fabric expansion joints can be provided in multiple pieces)
- Bolt-in or weld-in
Applications
Operating Range
- Up to ±5psig depending on applications
Materials
- Teflon
- Darlyn
- Viton
- EPDM
- Composite Teflon
Frame materials
- A36
- A588 (Corten)
- A516/70
- Stainless steel
- Other alloys
FIT
-
Belts are attached by bolting to angle or plate flanges, or duct sections.
-
End connections may conform to ducting sizes, or customer designed.
-
Fittings may be the same at each end or different.
-
Corners are typically 90 degree, but may also be rounded.
FORM:
-
One rectangular flow area non-metallic belt.
-
Typical dimensions of 12” x 12” minimum, up to 240” square. Overall length may vary, typically within the range of 12” to 48”.
-
Additional accessories maybe incorporated such as load
bearing restraints, movement limiters, protection devices.
FUNCTION
-
Absorbs ducting thermal or vibratory movement, primarily axial and lateral.
-
Movement amplitude varies, typically within the range of 1” to 6”.
-
Movement amplitude varies, typically within the range of 1/4” to 10”.
-
Movement frequency typically is low cycle (1 to 100 cycles per year).
